﻿November, 1904.] THE ORCHID REVIEW. 347 



made for watering as in the preceding species. These plants have no rest- 

 ing period, and should be watered whenever the compost seems to require 

 it, but, of course, a much smaller supply will be needed during the winter. 

 They should be placed in the coolest part of the house, well up to the light. 

 Repotting is seldom required, and a little weak, liquid manure is beneficial 

 •when flowering or actively growing. 



Few Dendrobiums succeed really well in the Intermediate house, as 

 they require a warmer temperature when growing, hut I), thyrsifiorum will 

 succeed here, especially if placed in the warmest corner of the house. It 

 produces large drooping racemes of flowers, having white sepals and petals 

 and a deep orange-yellow lip, which are extremely showy, though, un- 

 fortunately they do not last very long. It may be grown in pots or 

 baskets, preferably the former, and the compost should consist of fibrous 

 peat and sphagnum moss in equal proportions. Repotting, when required, 

 should be done as soon as flowering is over, when the plants begin to grow. 

 It should be disturbed as little as possible, any dead roots, however, being 

 removed, and the receptacles should be well drained. Place the plants in 

 a warm moist and shady corner, and encourage growth as much as 

 possible, watering very slightly at first, and abundantly when growth is 

 active. When growth is completed the amount should be gradually 

 reduced, but it should not be dried off like D. nobile, being an evergreen. 

 A sharp look out should be kept for yellow thrip, which is sometimes 

 apt to be troublesome. D. densiflorum requires similar treatment, and 

 chiefly differs in having yellow sepals and petals. 



Vanda ccerulea is a very beautiful autumn flowering species, which 

 succeeds well here in a light airy position, and is suitable for either pot or 

 basket culture. It should, however, be shaded from bright sunshine. 

 Vandas, Aerides and their allies require somewhat different treatment from 

 most other Orchids, as their aerial roots cannot be confined to the com- 

 post. The receptacles should be well drained with broken crocks, and 

 after the plants are placed in position they should be filled up with 

 sphagnum moss, and the stems secured by a few ties to keep them firm. 

 They require plenty of moisture when growing. It is advisable to cut 

 the spikes after the flowers have been expanded two or three weeks, to 

 avoid weakening the plants. 



Ccelogyne Massangeana succeeds well in baskets in the usual compost, 

 and soon grows into good specimens, which flower very freely when the 

 plants are strong, and its long pendulous racemes of buff-coloured flowers 



Several species and hybrids of Cypripedium will thrive well in this 

 house, and by judicious selection among the summer and winter flowering 

 kinds the flowering season may be prolonged over a considerable period. 



